This is a vintage hardcover book, REFERENCE DATA FOR RADIO ENGINEERS, 4th Edition, 6th Printing, 1960, published by the International Telephone and Telegraph Corporation.  It has 1121 pages plus index.  There is a former owner's name stamp on the inside cover, otherwise it is in very good, clean, solid condition.  Buyer to pay with eBay approved method.  Buyer to add $4.99 for Media Mail shipping and tracking within the USA only.